[R] R random number generation
markleeds at verizon.net
markleeds at verizon.net
Fri Oct 24 07:24:38 CEST 2008
below i think semi does what you want but it's never going to repeat a
value because it's sampling without replacement ? in that sense,
it's not as general as what you asked for. if you need the repeating
thing, then i'm not sure how to do that. hopefully someone else does.
lapply(1:30, function(.index) {
sample(1:.index,replace=FALSE,size=.index)
})
On Thu, Oct 23, 2008 at 8:53 PM, hiphop wrote:
> hi
>
> thanks for the reply
> actually am supposed to generate random numbers in oncreasing size.
> so when i say 1,2 i should get something like 12222 or 221 or 1112
> ...i
> should get both the values 1 and 2 in a random order but it should
> stop when
> both the values occur atleast once in the sequence.so after 1,2 it
> should be
> 1,2,3 and the sequence generated should have 1,2,3 atleast once.then
> it
> should generate a random sequence of numbers 1,2,3,4 ...it should go
> on till
> it generates 1,2....30.hope am clear now.
>
>
>
> hiphop wrote:
>>
>> i have to generate random numbers from length 2 to 30 and length two
>> should have the numbers 1,2 and length 3 should have the numbers
>> 1,2,3 so
>> on and so forth till size 30.i should get an sequence like 2222221 or
>> 1111112 till both the values appear and for 3 it should be 1222223 or
>> 3331112.i should get similar output for all sizes which means i
>> should get
>> 30 sequences.but am getting only one sequence .please help.
>> this is my code
>>
>> y=0;
>> for (i in 1:3)
>> {
>> while(y!=i)
>> {
>> y=sample(1:3,replace=TRUE);
>> }
>> }
>>
>>
>
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